Matching Buyers with Sellers…
…yes, this is exactly what we are doing at TradeHolding.com B2B Network. Buyers and Sellers state what are the products and services they are regulary selling and buying. Then, we are quickly calculating how many sellers are selling the product you are buying and viceversa, then you have the ability to send all of them a message, this way buyers and sellers are connected and a deal is very close. 
This feature is especially good in buying process, as an RFQ (request for quote), imagine the need to buy olive oil, or icumsa sugar. You just define your exact needs and send it to hundreds of qualified sellers! They will get back to you with their offer and you have the ability of selecting the best offer!
We received an excellent feedback from members who already tried this feature, they are quite satisfied with the responses. If you would like to try this, just join through one of our partner sites (for example: European Business Directory).